How to break in debugger in Q_ASSERT ?

[Radagast]

Hello!
I' m using Qt 4.6 + QtCreator + MinGW.
When an expression in Q_ASSERT evaluates to false my application just aborts with a message in the debug output, that is often meaningless. How can I make it to break into debugger to the line that contains the assert, so I can see the call stack?
I googled a lot, but found only
asm("int $0x3");
which is weird and won't work in x64.
Thanks in advance.

[Lykurg]

When an expression in Q_ASSERT evaluates to false my application just aborts with a message in the debug output, that is often meaningless

That's exactely like assert should work. And I can't say that the message is meaningless. It says in with line and in wich file the "error" occurs and then you can have a look at your statement and see why assert was triggered. If that is not enough you can have a look at Q_ASSERT_X to pass an option string which explains the error more. If you want to go in your debugger you can do that as an workaround:

if (condition)
{
  // <- set your break point here.
}

if (condition)
{
  // <- set your break point here.
}

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[Radagast]

In MS Visual Studio I break in debugger on assertions, which is much more useful than what we have in Qt Creator.
And if Q_ASSERT fails not in my code, but in Qt, the info about line and file is useless.

[squidge]

On windows, you can write your own ASSERT-style macro to call DebugBreak() which is like INT 3 but works across all supported CPUs.

(INT 3 simply means "Breakpoint Interrupt". People use it because it is fast and easy to type whilst writing code. It's easier than typing non-sense code, or hoping the compiler doesn't optimise it out, and coping with the breakpoints becoming invalid or moving as you edit the code)